nav{
    background-color: #5bc0de;
}
form{
    border:#2aabd2 solid 2px;
    border-radius: 5%;
    padding: 15px;
    background-color: #5bc0de;
}

section{
    width: 100%;
    height: 515px;
    background-image: url("../image/caochang.jpg");
    background-repeat:no-repeat;
    background-size: 100% 100%;
}
input{
    outline: none; /*按钮点击后，不出现框框*/
    border-radius: 20%;
    float: left;
    width: 200px;
    height: 200px;
    margin-left: 23%;
}
#btn4{
    border-radius: 50%;
}

nav{
    background-color: #5bc0de;
}
form{
    border:#2aabd2 solid 2px;
    border-radius: 5%;
    padding: 15px;
    background-color: #5bc0de;
}
section{
    background-image: url("../image/caochang.jpg");
    width: 100%;
    height: 515px;
    background-repeat:no-repeat;
    background-size: 100% 100%;
}
.well{
    background-color: #D3D3D3;
    margin-top: 4px;
    margin-bottom: 0;
}
* {
    margin: 0;
    padding: 0;
    font-family: 'montserrat', sans-serif;
    box-sizing: border-box;
}
.services-section {
    background: #333;
    background-size: cover;
    padding: 60px 0;
}
.inner-width {
    width: 100%;
    max-width: 1200px;
    margin: auto;
    padding: 0 20px;
    overflow: hidden;
}
.section-title {
    text-align: center;
    color: #ddd;
    text-transform: uppercase;
    font-size: 30px;
}
.border {
    width: 160px;
    height: 2px;
    background: #82ccdd;
    margin: 40px auto;
}
.services-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.service-box {
    max-width: 33.33%;
    padding: 10px;
    text-align: center;
    color: #ddd;
    cursor: pointer;
}
.service-icon {
    display: inline-block;
    width: 70px;
    height: 70px;
    border: 3px solid #82ccdd;
    color: #82ccdd;
    transform: rotate(45deg);
    margin-bottom: 30px;
    margin-top: 16px;
    transition: 0.3s linear;
}
.service-icon i {
    line-height: 70px;
    transform: rotate(-45deg);
    font-size: 26px;
}
.service-box:hover .service-icon {
    background: #82ccdd;
    color: #ddd;
}
.service-title {
    font-size: 18px;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.service-desc {
    font-size: 14px;
}
@media screen and (max-width: 960px) {
    .service-box {
        max-width: 45%;
    }
}
@media screen and (max-width: 768px) {
    .service-box {
        max-width: 50%;
    }
}
@media screen and (max-width: 480px) {
    .service-box {
        max-width: 100%;
    }
}